Malicious PDF — malware analysis report

Static analysis result for SHA-256 0889c20d5411d056…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 17:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db493a7489aa3897d521087a9ce3cfdb SHA-1: 7aab4e8d4ec8838af0270297fe3c40b2a26c3389 SHA-256: 0889c20d5411d056f09a5f6aab70b8d66ea67030171906721eb88c96c9e4ccfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=htv+sc+cam+apk+download'. This URL is likely used to phish credentials or deliver a second-stage payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=htv+sc+cam+apk+download
    • http://magnitoli-2ekran.site/gre_vocab_practice_test_onlineok4qn.pdf
    • http://openchambre.xyz/altec_lansing_mini_life_jacket_replacement_batteryyq678.pdf
    • https://static.s123-cdn-static.com/uploads/4470981/normal_600828ca8d209.pdf
    • http://menformula.xyz/wobunosj61pe.pdf
    • http://datingsexchat.site/easy_vegetarian_indian_dishes_for_dinner8tfhc.pdf
    • https://cdn-cms.f-static.net/uploads/4490138/normal_5fd835e6a93aa.pdf
    • http://future-techno.ru/mole_concept_practice_questionse81td.pdf
    • https://cdn-cms.f-static.net/uploads/4490739/normal_602df7c9ce5c0.pdf
    • http://abwaab.su/how_to_set_the_time_on_my_g_shock_55223oil1.pdf
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5ff120363b1c3.pdf
    • https://cdn-cms.f-static.net/uploads/4428054/normal_6009f0c526cbd.pdf
    • http://my-favshope.online/ragaxefedanitojea88z.pdf
    • https://cdn-cms.f-static.net/uploads/4456399/normal_605f8599ed167.pdf
    • https://static.s123-cdn-static.com/uploads/4384045/normal_5ff009c6a52a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wukevirenesu/faux_calligraphy_practice_sheets.pdf
    • https://s3.amazonaws.com/zarusegibitumet/rust_vs_c_performance_benchmark.pdf
    • https://s3.amazonaws.com/kibavutibeved/83472456836.pdf
    • https://s3.amazonaws.com/tutasujal/49504973721.pdf
    • https://s3.amazonaws.com/nufidibodudulad/tatat.pdf
    • https://s3.amazonaws.com/remeranexe/tetanexedinesuloxifo.pdf
    • https://s3.amazonaws.com/jefazaxal/52862535039.pdf
    • https://s3.amazonaws.com/bidemewufa/siradaxonarobokobola.pdf
    • https://s3.amazonaws.com/pipaneku/27851275829.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b2.bin
084c367151479d8752e62a394994031688a0eb388a4b14556266cf3aad72d897		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B2 5300 bytes
font_01_sfnt_off0000e4bb.bin
42686dd3d21fd94acb9b867813af93694ac340d16bea0423d91e1cf8fa49e44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 14040 bytes
font_02_sfnt_off00010eb6.bin
736d693a279500f18e0b09f1691bf961dea287bf9b09becd7ba6fcff60c34952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 9872 bytes

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